{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{5}{c}}
\toprule
            &\multicolumn{1}{c}{\shortstack{Expenditures,\\ t+1}}&\multicolumn{1}{c}{\shortstack{Contributions,\\ t+1}}&\multicolumn{1}{c}{\shortstack{Manifesto originality,\\ t+1}}&\multicolumn{1}{c}{\shortstack{First person,\\ t+1}}&\multicolumn{1}{c}{\shortstack{Past tense,\\ t+1}}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}\cmidrule(lr){5-5}\cmidrule(lr){6-6}
            &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         \\
\midrule
Upper bound &    3291.547\sym{**} &    3439.867\sym{**} &       0.155         &       0.083         &       0.192         \\
            &  (1395.336)         &  (1416.254)         &     (0.189)         &     (0.057)         &     (0.173)         \\
\addlinespace
Lower bound &     560.533         &     646.386         &      -0.113         &       0.036         &       0.026         \\
            &   (706.811)         &   (702.743)         &     (0.096)         &     (0.052)         &     (0.161)         \\
\midrule
Bootstrap replications&          10         &          10         &          10         &          10         &          10         \\
Mean, left of threshold&   11420.665         &   11620.358         &      -0.305         &       0.278         &       1.758         \\
\bottomrule
\end{tabular}
}
